You're likely thinking of the popular Chinese zodiacinspired gold bars, also known as Gold Bars with Zodiac Signs or (shēng xiào huáng jīn tiáo) in Chinese.
These gold bars typically feature a design with one of the twelve animals of the Chinese zodiac, such as the Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, or Pig、Each bar usually has a specific weight, purity, and serial number, making them collectible and valuable.
The gold bars often come with a certificate of authenticity and are popular among collectors and investors in China and other countries.
Are you interested in learning more about these gold bars or perhaps looking to purchase one?